ISRO Geo-Imaging Satellite GISAT-1

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ISRO Geo-Imaging Satellite GISAT-1

ISRO Geo-Imaging Satellite GISAT-1

Recently, the launch of ISRO Geo-imaging satellite GSAT-1 (GISAT-1) has failed. Through this launch the ‘Earth Observation Satellite’ EOS-03 was to be placed in a Geosynchronous Transfer Orbit (OTO).

It was eventually scheduled to be launched to geosynchronous earth orbit (GEO) via a GSLV-FI0 rocket.

Earth Observation Satellite (EOS-03)

  • This satellite is capable of real-time observation and imagery of the Earth; it can be used for quick monitoring of natural disasters, episodic events and any short-term events. This satellite was designed to serve for ten years.
  • The mission failed as the cryogenic high stage (stage III of GSLV) could not be ignited due to a technical discrepancy.
  • The cryogenic stage is the final stage of space launch vehicles. It uses liquid oxygen (LOX) and liquid hydrogen (LH2) as propellants.

About Geosynchronous Satellite Launch Vehicle (GSLV):

  • GSLV is a three-stage expandable space launch vehicle. It is used to launch satellites and other space objects into geostationary transfer orbit (GTO). It is designed, developed and operated by ISRO.
  • GSLV Mark II is the largest launch vehicle built by India.

About GTO and GEO

  • In GEO, satellites orbit the Earth over the equator from west to east, following the Earth’s rotation, traveling at the same speed as the Earth.
  • Transfer classes are special types of classes. They are used to move from one class to another.
  • Using relatively less energy from the inbuilt motors, the satellite or spacecraft can move from one orbit to another.
  • This enables the satellite to be launched to a high-altitude orbit like GEO without actually needing a launch vehicle, which requires more effort.

Source – The Hindu

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